8TB drives are SMR. That's a whole new world of emulation and possible failures. I would not recommend anyone use SMR drives for immediate use, ESPECIALLY for a pool under load apart from single-write-stream archiving.
Dan Sent from my iPhone (typos, autocorrect, and all) > On Aug 27, 2015, at 1:56 PM, Michael Talbott <mtalb...@lji.org> wrote: > > Anyone out there using 8TB Seagate drives in their storage pools? Reason I > ask is that I recently created a new server with a brand new Seagate > One-Store shelf full of 8TB seagate drives and everything was working pretty > well as long as it wasn't under load. But, once the i/o throughput started > getting heavy (700MB/s+) and random read/writes starting happening, I started > to get all kinds of random transport errors (from at least 50% of the drives) > reported by iostat -en. After a few days of transferring data at that rate > (while other random i/o was happening as well), it panic'd with: > > WARNING: /scsi_vhci/disk@g5000c500794b82b5 (sd87): > SYNCHRONIZE CACHE command failed (5) > > panic[cpu0]/thread=ffffff00f5217c40: assertion failed: > ldi_strategy(dvd->vd_lh,bp) == 0, file: ../../common/fs/zfs/vdev_disk.c, > line: 819 > > I'm thinking that maybe because these drives are known to have low random IOP > performance that maybe something is timing out causing an error in transport > that leads to some bad juju? > > On a side note, there we no transport errors when I sent data to the shelf > initially (300 TB+). Now that data is there and is being accessed with all > kinds of different requests, this happened. Go figure. > > Ideas? > > > ________________________ > Michael Talbott > Systems Administrator > La Jolla Institute > > _______________________________________________ > OmniOS-discuss mailing list > OmniOS-discuss@lists.omniti.com > http://lists.omniti.com/mailman/listinfo/omnios-discuss
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